There is a lot of conflicting information out there. This guy demos how you can get voice, but not data on the ATT $50 GoPhone unlimited plan. Even using APN changer he couldn't get it to work.
An iPhone is not treated as a PDA or a smartphone by ATT. It is treated as a unique category. It doesn't make sense to me, but that is what they do.
Check out this video on YouTube:
http://www.youtube.com/watch?v=w7Y5t...e_gdata_player
Sent from my iPad